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3 * Copyright 2009-2010 Vmware, Inc.
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33 #include "pipe/p_format.h"
34 #include "util/u_debug.h"
42 * Describe how to pack/unpack pixels into/from the prescribed format.
44 * XXX: This could be renamed to something like util_format_pack, or broke down
45 * in flags inside util_format_block that said exactly what we want.
47 enum util_format_layout {
49 * Formats with util_format_block::width == util_format_block::height == 1
50 * that can be described as an ordinary data structure.
52 UTIL_FORMAT_LAYOUT_PLAIN = 0,
55 * Formats with sub-sampled channels.
57 * This is for formats like YV12 where there is less than one sample per
60 UTIL_FORMAT_LAYOUT_SUBSAMPLED = 3,
63 * S3 Texture Compression formats.
65 UTIL_FORMAT_LAYOUT_S3TC = 4,
68 * Red-Green Texture Compression formats.
70 UTIL_FORMAT_LAYOUT_RGTC = 5,
73 * Ericsson Texture Compression
75 UTIL_FORMAT_LAYOUT_ETC = 6,
78 * Everything else that doesn't fit in any of the above layouts.
80 UTIL_FORMAT_LAYOUT_OTHER = 7
84 struct util_format_block
86 /** Block width in pixels */
89 /** Block height in pixels */
92 /** Block size in bits */
97 enum util_format_type {
98 UTIL_FORMAT_TYPE_VOID = 0,
99 UTIL_FORMAT_TYPE_UNSIGNED = 1,
100 UTIL_FORMAT_TYPE_SIGNED = 2,
101 UTIL_FORMAT_TYPE_FIXED = 3,
102 UTIL_FORMAT_TYPE_FLOAT = 4
106 enum util_format_swizzle {
107 UTIL_FORMAT_SWIZZLE_X = 0,
108 UTIL_FORMAT_SWIZZLE_Y = 1,
109 UTIL_FORMAT_SWIZZLE_Z = 2,
110 UTIL_FORMAT_SWIZZLE_W = 3,
111 UTIL_FORMAT_SWIZZLE_0 = 4,
112 UTIL_FORMAT_SWIZZLE_1 = 5,
113 UTIL_FORMAT_SWIZZLE_NONE = 6,
114 UTIL_FORMAT_SWIZZLE_MAX = 7 /**< Number of enums counter (must be last) */
118 enum util_format_colorspace {
119 UTIL_FORMAT_COLORSPACE_RGB = 0,
120 UTIL_FORMAT_COLORSPACE_SRGB = 1,
121 UTIL_FORMAT_COLORSPACE_YUV = 2,
122 UTIL_FORMAT_COLORSPACE_ZS = 3
126 struct util_format_channel_description
128 unsigned type:5; /**< UTIL_FORMAT_TYPE_x */
129 unsigned normalized:1;
130 unsigned pure_integer:1;
131 unsigned size:9; /**< bits per channel */
135 struct util_format_description
137 enum pipe_format format;
142 * Short name, striped of the prefix, lower case.
144 const char *short_name;
147 * Pixel block dimensions.
149 struct util_format_block block;
151 enum util_format_layout layout;
154 * The number of channels.
156 unsigned nr_channels:3;
159 * Whether all channels have the same number of (whole) bytes.
164 * Whether the pixel format can be described as a bitfield structure.
167 * - pixel depth must be 8, 16, or 32 bits;
168 * - all channels must be unsigned, signed, or void
170 unsigned is_bitmask:1;
173 * Whether channels have mixed types (ignoring UTIL_FORMAT_TYPE_VOID).
178 * Input channel description.
180 * Only valid for UTIL_FORMAT_LAYOUT_PLAIN formats.
182 struct util_format_channel_description channel[4];
185 * Output channel swizzle.
187 * The order is either:
191 * depending on the colorspace.
193 unsigned char swizzle[4];
196 * Colorspace transformation.
198 enum util_format_colorspace colorspace;
201 * Unpack pixel blocks to R8G8B8A8_UNORM.
202 * Note: strides are in bytes.
204 * Only defined for non-depth-stencil formats.
207 (*unpack_rgba_8unorm)(uint8_t *dst, unsigned dst_stride,
208 const uint8_t *src, unsigned src_stride,
209 unsigned width, unsigned height);
212 * Pack pixel blocks from R8G8B8A8_UNORM.
213 * Note: strides are in bytes.
215 * Only defined for non-depth-stencil formats.
218 (*pack_rgba_8unorm)(uint8_t *dst, unsigned dst_stride,
219 const uint8_t *src, unsigned src_stride,
220 unsigned width, unsigned height);
223 * Fetch a single pixel (i, j) from a block.
225 * XXX: Only defined for a very few select formats.
228 (*fetch_rgba_8unorm)(uint8_t *dst,
230 unsigned i, unsigned j);
233 * Unpack pixel blocks to R32G32B32A32_FLOAT.
234 * Note: strides are in bytes.
236 * Only defined for non-depth-stencil formats.
239 (*unpack_rgba_float)(float *dst, unsigned dst_stride,
240 const uint8_t *src, unsigned src_stride,
241 unsigned width, unsigned height);
244 * Pack pixel blocks from R32G32B32A32_FLOAT.
245 * Note: strides are in bytes.
247 * Only defined for non-depth-stencil formats.
250 (*pack_rgba_float)(uint8_t *dst, unsigned dst_stride,
251 const float *src, unsigned src_stride,
252 unsigned width, unsigned height);
255 * Fetch a single pixel (i, j) from a block.
257 * Only defined for non-depth-stencil and non-integer formats.
260 (*fetch_rgba_float)(float *dst,
262 unsigned i, unsigned j);
265 * Unpack pixels to Z32_UNORM.
266 * Note: strides are in bytes.
268 * Only defined for depth formats.
271 (*unpack_z_32unorm)(uint32_t *dst, unsigned dst_stride,
272 const uint8_t *src, unsigned src_stride,
273 unsigned width, unsigned height);
276 * Pack pixels from Z32_FLOAT.
277 * Note: strides are in bytes.
279 * Only defined for depth formats.
282 (*pack_z_32unorm)(uint8_t *dst, unsigned dst_stride,
283 const uint32_t *src, unsigned src_stride,
284 unsigned width, unsigned height);
287 * Unpack pixels to Z32_FLOAT.
288 * Note: strides are in bytes.
290 * Only defined for depth formats.
293 (*unpack_z_float)(float *dst, unsigned dst_stride,
294 const uint8_t *src, unsigned src_stride,
295 unsigned width, unsigned height);
298 * Pack pixels from Z32_FLOAT.
299 * Note: strides are in bytes.
301 * Only defined for depth formats.
304 (*pack_z_float)(uint8_t *dst, unsigned dst_stride,
305 const float *src, unsigned src_stride,
306 unsigned width, unsigned height);
309 * Unpack pixels to S8_UINT.
310 * Note: strides are in bytes.
312 * Only defined for stencil formats.
315 (*unpack_s_8uint)(uint8_t *dst, unsigned dst_stride,
316 const uint8_t *src, unsigned src_stride,
317 unsigned width, unsigned height);
320 * Pack pixels from S8_UINT.
321 * Note: strides are in bytes.
323 * Only defined for stencil formats.
326 (*pack_s_8uint)(uint8_t *dst, unsigned dst_stride,
327 const uint8_t *src, unsigned src_stride,
328 unsigned width, unsigned height);
331 * Unpack pixel blocks to R32G32B32A32_UINT.
332 * Note: strides are in bytes.
334 * Only defined for INT formats.
337 (*unpack_rgba_uint)(unsigned *dst, unsigned dst_stride,
338 const uint8_t *src, unsigned src_stride,
339 unsigned width, unsigned height);
342 (*pack_rgba_uint)(uint8_t *dst, unsigned dst_stride,
343 const unsigned *src, unsigned src_stride,
344 unsigned width, unsigned height);
347 * Unpack pixel blocks to R32G32B32A32_SINT.
348 * Note: strides are in bytes.
350 * Only defined for INT formats.
353 (*unpack_rgba_sint)(signed *dst, unsigned dst_stride,
354 const uint8_t *src, unsigned src_stride,
355 unsigned width, unsigned height);
358 (*pack_rgba_sint)(uint8_t *dst, unsigned dst_stride,
359 const int *src, unsigned src_stride,
360 unsigned width, unsigned height);
363 * Fetch a single pixel (i, j) from a block.
365 * Only defined for unsigned (pure) integer formats.
368 (*fetch_rgba_uint)(uint32_t *dst,
370 unsigned i, unsigned j);
373 * Fetch a single pixel (i, j) from a block.
375 * Only defined for signed (pure) integer formats.
378 (*fetch_rgba_sint)(int32_t *dst,
380 unsigned i, unsigned j);
384 extern const struct util_format_description
385 util_format_description_table[];
388 const struct util_format_description *
389 util_format_description(enum pipe_format format);
393 * Format query functions.
396 static INLINE const char *
397 util_format_name(enum pipe_format format)
399 const struct util_format_description *desc = util_format_description(format);
403 return "PIPE_FORMAT_???";
409 static INLINE const char *
410 util_format_short_name(enum pipe_format format)
412 const struct util_format_description *desc = util_format_description(format);
419 return desc->short_name;
423 * Whether this format is plain, see UTIL_FORMAT_LAYOUT_PLAIN for more info.
425 static INLINE boolean
426 util_format_is_plain(enum pipe_format format)
428 const struct util_format_description *desc = util_format_description(format);
434 return desc->layout == UTIL_FORMAT_LAYOUT_PLAIN ? TRUE : FALSE;
437 static INLINE boolean
438 util_format_is_compressed(enum pipe_format format)
440 const struct util_format_description *desc = util_format_description(format);
447 switch (desc->layout) {
448 case UTIL_FORMAT_LAYOUT_S3TC:
449 case UTIL_FORMAT_LAYOUT_RGTC:
450 /* XXX add other formats in the future */
457 static INLINE boolean
458 util_format_is_s3tc(enum pipe_format format)
460 const struct util_format_description *desc = util_format_description(format);
467 return desc->layout == UTIL_FORMAT_LAYOUT_S3TC ? TRUE : FALSE;
470 static INLINE boolean
471 util_format_is_srgb(enum pipe_format format)
473 const struct util_format_description *desc = util_format_description(format);
474 return desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB;
477 static INLINE boolean
478 util_format_has_depth(const struct util_format_description *desc)
480 return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
481 desc->swizzle[0] != UTIL_FORMAT_SWIZZLE_NONE;
484 static INLINE boolean
485 util_format_has_stencil(const struct util_format_description *desc)
487 return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
488 desc->swizzle[1] != UTIL_FORMAT_SWIZZLE_NONE;
491 static INLINE boolean
492 util_format_is_depth_or_stencil(enum pipe_format format)
494 const struct util_format_description *desc = util_format_description(format);
501 return util_format_has_depth(desc) ||
502 util_format_has_stencil(desc);
505 static INLINE boolean
506 util_format_is_depth_and_stencil(enum pipe_format format)
508 const struct util_format_description *desc = util_format_description(format);
515 return util_format_has_depth(desc) &&
516 util_format_has_stencil(desc);
521 * Give the RGBA colormask of the channels that can be represented in this
524 * That is, the channels whose values are preserved.
526 static INLINE unsigned
527 util_format_colormask(const struct util_format_description *desc)
532 switch (desc->colorspace) {
533 case UTIL_FORMAT_COLORSPACE_RGB:
534 case UTIL_FORMAT_COLORSPACE_SRGB:
535 case UTIL_FORMAT_COLORSPACE_YUV:
537 for (chan = 0; chan < 4; ++chan) {
538 if (desc->swizzle[chan] < 4) {
539 colormask |= (1 << chan);
543 case UTIL_FORMAT_COLORSPACE_ZS:
553 util_format_is_float(enum pipe_format format);
557 util_format_is_rgb_no_alpha(enum pipe_format format);
561 util_format_is_luminance(enum pipe_format format);
565 util_format_is_luminance_alpha(enum pipe_format format);
569 util_format_is_intensity(enum pipe_format format);
572 util_format_is_pure_integer(enum pipe_format format);
575 util_format_is_pure_sint(enum pipe_format format);
578 util_format_is_pure_uint(enum pipe_format format);
581 * Whether the src format can be blitted to destation format with a simple
585 util_is_format_compatible(const struct util_format_description *src_desc,
586 const struct util_format_description *dst_desc);
589 * Whether the format is supported by Gallium for the given bindings.
590 * This covers S3TC textures and floating-point render targets.
593 util_format_is_supported(enum pipe_format format, unsigned bind);
596 * Whether this format is a rgab8 variant.
598 * That is, any format that matches the
600 * PIPE_FORMAT_?8?8?8?8_UNORM
602 static INLINE boolean
603 util_format_is_rgba8_variant(const struct util_format_description *desc)
607 if(desc->block.width != 1 ||
608 desc->block.height != 1 ||
609 desc->block.bits != 32)
612 for(chan = 0; chan < 4; ++chan) {
613 if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
614 desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
616 if(desc->channel[chan].size != 8)
625 * Return total bits needed for the pixel format per block.
628 util_format_get_blocksizebits(enum pipe_format format)
630 const struct util_format_description *desc = util_format_description(format);
637 return desc->block.bits;
641 * Return bytes per block (not pixel) for the given format.
644 util_format_get_blocksize(enum pipe_format format)
646 uint bits = util_format_get_blocksizebits(format);
648 assert(bits % 8 == 0);
654 util_format_get_blockwidth(enum pipe_format format)
656 const struct util_format_description *desc = util_format_description(format);
663 return desc->block.width;
667 util_format_get_blockheight(enum pipe_format format)
669 const struct util_format_description *desc = util_format_description(format);
676 return desc->block.height;
679 static INLINE unsigned
680 util_format_get_nblocksx(enum pipe_format format,
683 unsigned blockwidth = util_format_get_blockwidth(format);
684 return (x + blockwidth - 1) / blockwidth;
687 static INLINE unsigned
688 util_format_get_nblocksy(enum pipe_format format,
691 unsigned blockheight = util_format_get_blockheight(format);
692 return (y + blockheight - 1) / blockheight;
695 static INLINE unsigned
696 util_format_get_nblocks(enum pipe_format format,
700 return util_format_get_nblocksx(format, width) * util_format_get_nblocksy(format, height);
704 util_format_get_stride(enum pipe_format format,
707 return util_format_get_nblocksx(format, width) * util_format_get_blocksize(format);
711 util_format_get_2d_size(enum pipe_format format,
715 return util_format_get_nblocksy(format, height) * stride;
719 util_format_get_component_bits(enum pipe_format format,
720 enum util_format_colorspace colorspace,
723 const struct util_format_description *desc = util_format_description(format);
724 enum util_format_colorspace desc_colorspace;
731 assert(component < 4);
733 /* Treat RGB and SRGB as equivalent. */
734 if (colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
735 colorspace = UTIL_FORMAT_COLORSPACE_RGB;
737 if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
738 desc_colorspace = UTIL_FORMAT_COLORSPACE_RGB;
740 desc_colorspace = desc->colorspace;
743 if (desc_colorspace != colorspace) {
747 switch (desc->swizzle[component]) {
748 case UTIL_FORMAT_SWIZZLE_X:
749 return desc->channel[0].size;
750 case UTIL_FORMAT_SWIZZLE_Y:
751 return desc->channel[1].size;
752 case UTIL_FORMAT_SWIZZLE_Z:
753 return desc->channel[2].size;
754 case UTIL_FORMAT_SWIZZLE_W:
755 return desc->channel[3].size;
761 static INLINE boolean
762 util_format_has_alpha(enum pipe_format format)
764 const struct util_format_description *desc = util_format_description(format);
771 switch (desc->colorspace) {
772 case UTIL_FORMAT_COLORSPACE_RGB:
773 case UTIL_FORMAT_COLORSPACE_SRGB:
774 return desc->swizzle[3] != UTIL_FORMAT_SWIZZLE_1;
775 case UTIL_FORMAT_COLORSPACE_YUV:
777 case UTIL_FORMAT_COLORSPACE_ZS:
786 * Given a linear RGB colorspace format, return the corresponding SRGB
787 * format, or PIPE_FORMAT_NONE if none.
789 static INLINE enum pipe_format
790 util_format_srgb(enum pipe_format format)
793 case PIPE_FORMAT_L8_UNORM:
794 return PIPE_FORMAT_L8_SRGB;
795 case PIPE_FORMAT_L8A8_UNORM:
796 return PIPE_FORMAT_L8A8_SRGB;
797 case PIPE_FORMAT_R8G8B8_UNORM:
798 return PIPE_FORMAT_R8G8B8_SRGB;
799 case PIPE_FORMAT_A8B8G8R8_UNORM:
800 return PIPE_FORMAT_A8B8G8R8_SRGB;
801 case PIPE_FORMAT_X8B8G8R8_UNORM:
802 return PIPE_FORMAT_X8B8G8R8_SRGB;
803 case PIPE_FORMAT_B8G8R8A8_UNORM:
804 return PIPE_FORMAT_B8G8R8A8_SRGB;
805 case PIPE_FORMAT_B8G8R8X8_UNORM:
806 return PIPE_FORMAT_B8G8R8X8_SRGB;
807 case PIPE_FORMAT_A8R8G8B8_UNORM:
808 return PIPE_FORMAT_A8R8G8B8_SRGB;
809 case PIPE_FORMAT_X8R8G8B8_UNORM:
810 return PIPE_FORMAT_X8R8G8B8_SRGB;
811 case PIPE_FORMAT_DXT1_RGB:
812 return PIPE_FORMAT_DXT1_SRGB;
813 case PIPE_FORMAT_DXT1_RGBA:
814 return PIPE_FORMAT_DXT1_SRGBA;
815 case PIPE_FORMAT_DXT3_RGBA:
816 return PIPE_FORMAT_DXT3_SRGBA;
817 case PIPE_FORMAT_DXT5_RGBA:
818 return PIPE_FORMAT_DXT5_SRGBA;
820 return PIPE_FORMAT_NONE;
825 * Given an sRGB format, return the corresponding linear colorspace format.
826 * For non sRGB formats, return the format unchanged.
828 static INLINE enum pipe_format
829 util_format_linear(enum pipe_format format)
832 case PIPE_FORMAT_L8_SRGB:
833 return PIPE_FORMAT_L8_UNORM;
834 case PIPE_FORMAT_L8A8_SRGB:
835 return PIPE_FORMAT_L8A8_UNORM;
836 case PIPE_FORMAT_R8G8B8_SRGB:
837 return PIPE_FORMAT_R8G8B8_UNORM;
838 case PIPE_FORMAT_A8B8G8R8_SRGB:
839 return PIPE_FORMAT_A8B8G8R8_UNORM;
840 case PIPE_FORMAT_X8B8G8R8_SRGB:
841 return PIPE_FORMAT_X8B8G8R8_UNORM;
842 case PIPE_FORMAT_B8G8R8A8_SRGB:
843 return PIPE_FORMAT_B8G8R8A8_UNORM;
844 case PIPE_FORMAT_B8G8R8X8_SRGB:
845 return PIPE_FORMAT_B8G8R8X8_UNORM;
846 case PIPE_FORMAT_A8R8G8B8_SRGB:
847 return PIPE_FORMAT_A8R8G8B8_UNORM;
848 case PIPE_FORMAT_X8R8G8B8_SRGB:
849 return PIPE_FORMAT_X8R8G8B8_UNORM;
850 case PIPE_FORMAT_DXT1_SRGB:
851 return PIPE_FORMAT_DXT1_RGB;
852 case PIPE_FORMAT_DXT1_SRGBA:
853 return PIPE_FORMAT_DXT1_RGBA;
854 case PIPE_FORMAT_DXT3_SRGBA:
855 return PIPE_FORMAT_DXT3_RGBA;
856 case PIPE_FORMAT_DXT5_SRGBA:
857 return PIPE_FORMAT_DXT5_RGBA;
864 * Return the number of components stored.
865 * Formats with block size != 1x1 will always have 1 component (the block).
867 static INLINE unsigned
868 util_format_get_nr_components(enum pipe_format format)
870 const struct util_format_description *desc = util_format_description(format);
871 return desc->nr_channels;
875 * Return the index of the first non-void channel
876 * -1 if no non-void channels
879 util_format_get_first_non_void_channel(enum pipe_format format)
881 const struct util_format_description *desc = util_format_description(format);
884 for (i = 0; i < 4; i++)
885 if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID)
895 * Format access functions.
899 util_format_read_4f(enum pipe_format format,
900 float *dst, unsigned dst_stride,
901 const void *src, unsigned src_stride,
902 unsigned x, unsigned y, unsigned w, unsigned h);
905 util_format_write_4f(enum pipe_format format,
906 const float *src, unsigned src_stride,
907 void *dst, unsigned dst_stride,
908 unsigned x, unsigned y, unsigned w, unsigned h);
911 util_format_read_4ub(enum pipe_format format,
912 uint8_t *dst, unsigned dst_stride,
913 const void *src, unsigned src_stride,
914 unsigned x, unsigned y, unsigned w, unsigned h);
917 util_format_write_4ub(enum pipe_format format,
918 const uint8_t *src, unsigned src_stride,
919 void *dst, unsigned dst_stride,
920 unsigned x, unsigned y, unsigned w, unsigned h);
923 util_format_read_4ui(enum pipe_format format,
924 unsigned *dst, unsigned dst_stride,
925 const void *src, unsigned src_stride,
926 unsigned x, unsigned y, unsigned w, unsigned h);
929 util_format_write_4ui(enum pipe_format format,
930 const unsigned int *src, unsigned src_stride,
931 void *dst, unsigned dst_stride,
932 unsigned x, unsigned y, unsigned w, unsigned h);
935 util_format_read_4i(enum pipe_format format,
936 int *dst, unsigned dst_stride,
937 const void *src, unsigned src_stride,
938 unsigned x, unsigned y, unsigned w, unsigned h);
941 util_format_write_4i(enum pipe_format format,
942 const int *src, unsigned src_stride,
943 void *dst, unsigned dst_stride,
944 unsigned x, unsigned y, unsigned w, unsigned h);
947 * Generic format conversion;
951 util_format_fits_8unorm(const struct util_format_description *format_desc);
954 util_format_translate(enum pipe_format dst_format,
955 void *dst, unsigned dst_stride,
956 unsigned dst_x, unsigned dst_y,
957 enum pipe_format src_format,
958 const void *src, unsigned src_stride,
959 unsigned src_x, unsigned src_y,
960 unsigned width, unsigned height);
963 * Swizzle operations.
966 /* Compose two sets of swizzles.
967 * If V is a 4D vector and the function parameters represent functions that
968 * swizzle vector components, this holds:
969 * swz2(swz1(V)) = dst(V)
971 void util_format_compose_swizzles(const unsigned char swz1[4],
972 const unsigned char swz2[4],
973 unsigned char dst[4]);
975 void util_format_swizzle_4f(float *dst, const float *src,
976 const unsigned char swz[4]);
978 void util_format_unswizzle_4f(float *dst, const float *src,
979 const unsigned char swz[4]);
985 #endif /* ! U_FORMAT_H */